A good photo with an unusual gathering. The only improvement I would make is to crop out some of the top. The result would be my emphasis on the dragonflies..
Because of the volume of mosquitos dragonflies eat, they are my favorite insect, but who knew the dragonfly world had it's own version of the "Flying Walenzas?" I've seen 3 of them doing this prehensile monkey tail-grab thing before, but never 6! You were lucky to be there.
This is one of the most unique and interesting insect shots I've seen here. My first instinct was that this was a craft rather than live dragonflies. I agree that a top crop would make the shot even better.
H